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Round|Natural|IGI

1.25ct I IF Round Natural Diamond

EX • I/IF • IGI 821618736

Shape and cutting style on the report: Round brilliant

Certificate IGI 821618736

Diamond specifications and retailer prices

From £2,166 GBP
As of November 4, 2026
Save £2,057 GBP (49%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £4,559 GBP at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.25ct natural round diamond

This 1.25ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI 821618736. Listed at 14 retailers as of November 4, 2026, with a 95% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.25
Carat
I
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.4°
Pavilion angle41°
OriginNatural
Grading LabIGI
CertificateIGI 821618736
Dimensions6.86 × 6.90 × 4.26 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.86 mm6.90 mm1.25 ctI / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 821618736
Side View
Table 59.0%Crown 36.4°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £2,435 GBP|Low: £2,120 GBP|High: £4,400 GBP|Avg: £2,830 GBP|+1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 9£2,166 GBP
Retailer 6£2,188 GBP
Retailer 2£2,398 GBP
Retailer 10£2,400 GBP
Retailer 1£2,435 GBP
Retailer 5£2,754 GBP
Retailer 3£2,755 GBP
Retailer 4£3,091 GBP
Retailer 8£3,728 GBP
Retailer 7£4,223 GBP

27 data points across 10 retailers

14 retailers£2,166 GBP to £4,223 GBP

A
Cheapest Retailer
-
£2,166 GBP
A
Retailer 2
-
£2,188 GBP
View
A
Retailer 3
-
£2,398 GBP
View
A
Retailer 4
-
£2,400 GBP
View
A
Retailer 5
-
£2,435 GBP
View
Retailer 6
-
£2,460 GBP
View
Price last confirmed 21 days ago
Retailer 7
-
£2,559 GBP
View
Price last confirmed 22 days ago
Retailer 8
-
£2,617 GBP
View
Price last confirmed 19 days ago
A
Retailer 9
-
£2,754 GBP
View
A
Retailer 10
-
£2,755 GBP
View
A
Retailer 11
-
£3,091 GBP
View
A
Retailer 12
-
£3,728 GBP
View
B+
Retailer 13
-
£4,223 GBP
View
Most Expensive
NZ Jewellers
e01ccdae-a9a8-4251-9c4a-c65804b2ef46 · Oct 17
£4,559 GBP
$6,136 USD
View
Price last confirmed 19 days ago
13 more retailers have this diamond
Prices start from £2,166 GBPSave up to £2,057 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.25ct Round
£2,166 GBP